i3 - A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
Operator - Looking for something? Make a request and we'll find it.
awesome - A dynamic window manager for the X Window System developed in the C and Lua programming languages.
Magic - Get whatever you want on demand with no hassle, through SMS
dwm - dwm is a dynamic window manager for X. It manages windows in tiled, monocle and floating layouts. All of the layouts can be applied dynamically, optimising the environment for the application in use and the task performed.
Slack - A messaging app for teams who see through the Earth!